Lawn-mower sharpener.



PATENTED DEC. 81, 1907.

5. GHESBRG.

Iv HAPL-PENERX LAWN FILED APR. 18,1907

APPLIOATKON 1 9i m was:

' declare the following encemarked thereon, which Specification of Letters Patent.

Patented Dec. 31, 1907.

Application filed April 18.1907. 8eria1-No. 368.980.

To all whom it may concern: .Be it knownthat I, JOHN Cnnssno, a citizen of the United States, resident of Oneonta, in the county of Otsego and State of New York, have made a certain new and useful Invention in Lawn-Mower Shar eners; and I to be a full, clear, and 'exact description 0 the same, such aswill enable others skilled in the art to whichfit a'gpertains to make and use the invention, re erence being had to the accompanying drawings, and'to letters or area of referorm a part of this specification:

Figure 1 is a vertical transverse section of wgthe invention asapplied. Fig. 2 is a per -'spective view of the invention.

Fig. 3 1s a sectional view of the invention, the section being taken through the connecting bolts. Fig. 4 is a bottom plan view partly broken away of one offtheframe bars and its clamp-' ing plate.

the purpose of altering the tension of the coiled springs. Fig. 6 is a similar view illustrati gyielding of the file stick at o side under the-potion ofthe mower knive Theinvention-relates to lawnmower sharp enersQ and it-consists-in the novelponstrueclamping late b' 40' tied; and combinatiohsof partsas isetforth.

' porting frame bars, of whichJ-twoare einafter In'the accompanying drawings illustrating the invention, the letter a designates suprovided, one at each end portion ofthedeiiice, such bars having, each ward arched portion a, having inner arched surface a, rovided with teeth"a, A

ame bar v I a h b nut tfih bolt. e lQ d,"Qf the frame bar adjacent ,to said arched "por tion thereof, and having a squared portion 0 engaging a slot c, of the clamp plate. This p-p inner end, having a toothed arched inner-surface 5 cooperating with the toothed inner surface of the frame bar to secure the device 1n position upon the brace bar z of the mower. The clamp plate is capable of. adjustment upon the inward, extending end portion b" Fig. 5 is a view similar-toFig; 3, showing-adjustment of the thumb screw for 'f EOItIQIIS,

1 olt heads at one end 'and'against the frame an intermediate out-- connection "with each p y means of a bolt 0, provided with ate has an arched portion b; at its thereof, which has abutment against. the

frame bar as 'a center to increase or'decrease' v the-distance betweenthe arched toothed sursp n 13 y or headof the cone. Thus, 11

'b'arsto vary the tension of the coil s 4 v The coil springs o','-i n' the-cone extensions act :against t modatemower brace bars ters, the squared portion 0 of the bolt haw ing the necessary lplay in the slot of the clam plate in which it ts, and the bolt having ad ustment in the slot of the frame-bar.

c, this blade bemg secured u base f, and having a beveled s face e, for proper action upon t e circular knives of the mower.

g is the metal back plate of the emery stick having a slot and b0 t connection 9 therewith to allow for adjustmentof the emerystick with relation to such back plateto fit varying sizes of mowers. This metal back plate is connected to the means of bolts it, two of which are providedfor each frame bar, these bolts having threaded inner ends engaging nutsh, located squared seats h, of the wooden base of the emery on a wooden At the--- opposite or lower ends of the frame bars is carried the sharpening blade or emery stick of varying diame frame bars a, by

stick just in rear of the metal back 1 plate through perforations h, of which these screw bolts pass. outstanding or projecting portions 5,, coiledand having abutment against thebars at the op ositeend thereof. Thus theeiherystick W1 l'have a yielding pressure or action upon the knives of; thepresses even y upon such knives at all times.

' In order to provide tension adjusti means: for the s rings 9', a hollow cone extension k, isprovide screw bolts h, this cone extension having a for each frame'bar between the.

The bolts b have headed surrounding each of the projecting 'ea mower and engaged by-tension adjusting thumb: screw m, passing through metal back plate of-thecone'exte'nsion between the nut i and the top onfi. 'ustmentso P to may from the frame s g.

of the thumb screw the metal be adjusted towards or away time act to. kee adju i thum jative position. I feces of clamp plate, and frame bar to aocom 1;

Having described the invention, what a perforation the t'op'oii .the cone extension, and healing at its lower "end against the emery stick-:- A coil-springo is located in'each) the sharpening stick at each end I 'claim and desire to secure by Letters Patent is r 1. A lawn mower sharpener, having a sharpening stick, and frame bars having each a supporting connection with the mower frame and a direct, yieldable connection with ortion ithereof including outward projecting eaded bolts, and coiled springs surrounding said bolts carried by the sharpening stick and having loose engagement with perforations of sald frame bars and abutting at their ends against the heads thereof and said frame bars.

' ,2. A lawn mower sharpener having a ,jsharpening stick, frame bars having each a. supporting connection with the mower frame k I and a direct yieldable connection with the sharpening stick at each end portion thereof,

I frame, and a direct yieldable spring-pressed connection with the sharpening stick at each end portion thereof.

4. A lawn mower sharpener having a sharpening stick provided with a back and frame bars having each a supporting connection with the mower frame, and a direct, yieldable connection with the sharpening stick at each end portion thereo including nuts between the sharpening stick and its back plate, outward projecting headed bolts engaging such nuts, and coiled springs surrounding such bolts and abutting at their ends against the heads thereof and said frame bars.

5. A lawn movsger. sharpener having a sharpening stick, alaterally adjustable back plate having a slot and bolt connection with the sharpening stick, and frame barshaving each a supporting connection with the mower frame, and a direct yieldable connection'with .the sharpening stick at each end portion thereof, including nuts between such stick 1 and its back plate, outward projecting headp ate,-

ed bolts engaging such nuts, and coiled springs surrounding said bolts and abutting at their ends against the heads thereof an said frame bars.

6. In a lawn mower sharpener, the combination of a sharpening stick, su porting frame bars carrying said stick an having each an arched vided with a s ot, clamping plates having each an arched ortion and an extension provided with a sfdt, and bolt connections for frame bars and clamping plates engaging the slotsof the frame bars and having squared portions engaging the slots of the clamping plates said bolt connections having securing nuts.

7. In a lawn mower sharpener, the combination of a sharpening stick, frame bars having each a supporting connection with the mower frame, and a direct, yieldable connection with the sharpening stick at each end ortion thereof, including outward projecting headed bolts and coiled springs surrounding said bolts and abutting at their ends against the heads thereof and said frame bars, said framebars having each an arched portion and an extension provided with a slot,-

clamping plates having each an arched portion and an extension provided with a slot, and bolt connections for frame bars and clamping plates engaging the slots of the frame bars and having squared portions engagingthe slots of the clamping plates.

8. lawn mower sharpener including a sharpening stick, and supporting. frame bars having a yieldable connection with said sharpening stick including outward projecting headed bolts and coil springs surrounding said bolts and located between the heads thereof and the sharpening stick, and tension adjusting meansfor said coiled'spring's including bolts located in hollow cone extensions of the supporting frame bars, and hearing at their inner ends a ainst the sharpening stick, nuts upon such be ts in the hollow cone extensions, and coiled springs surrounding the bolts and located between the nuts thereof and the ends of the cone extensions.

In testimony whereof I affix my signature,

'invpresence oftwo witnesses.

JOHN- OHESBRO.

Witnesses:

' CHARLES GKRDINER, 'DoUoL'As W. MILLER.

ortion and an extension pro- 

